/**
* \brief Reset CRC module and set source to I/O interface
*
* This function initializes the CRC module, and \ref crc_io_checksum_byte_add
* can be used to add bytes to calculate checksum for. When any number of bytes
* have been added, the \ref crc_io_checksum_byte_stop can be called to disable
* the module and get the calculated checksum.
*
* \param crc_16_32 Indicator for whether CRC-32 or CRC-16 shall be used
*/
void crc_io_checksum_byte_start(enum crc_16_32_t crc_16_32)
{
/* Initialize CRC calculations on I/O interface */
crc_reset();
/* Enable CRC-32 if chosen */
if (crc_16_32 == CRC_32BIT) {
crc_32_enable();
}
/* Enable CRC module using the I/O interface */
crc_set_source(CRC_SOURCE_IO_gc);
}
uint32_t
calc_crc(uint32_t* ptr, int len) {
crc_reset();
uint32_t crc = crc_calculate_block(ptr, len);
return crc;
}